See "it's so high that even the Yellow Crane Pass is difficult to walk". Excerpts show the worries about the future of the country, but also write about the difficulties of the road of Shu. There is a saying in Jiange of Jin Dynasty that "one person loses the halberd, ten thousand people lose their hoofs", and Li Bai plays it here.
The word "one person guards it" means: "Although one person guards it, ten thousand people can't force it. However, if you keep or
The robber's relatives will go, but the wolf to his companion? .
If the pass is not guarded by reliable people, it will suffer. When the author wrote this poem, he had foreseen that this would happen. Later generations used the idiom "one person's strength is above ten thousand people" to describe the danger in this area.